Dialectical Behavioral Therapy (DBT) is a form of Cognitive Behavioral Therapy (CBT).
DBT has been primarily used with clients diagnosed with Borderline Personality Disorder. Marsha Linehan, the creator of DBT, believes there are three causes of Borderline Personality Disorder: biological, social, and the interaction between these two factors.
Biosocial theory is any approach explaining the personality or human behavior in terms of biological predispositions as influenced by social or environmental factors.
Validation - listen, don't try to fix